IOU

From Longman Dictionary of Contemporary EnglishIOUIOU /ˌaɪ əʊ ˈjuː $ -oʊ-/ noun [countable] informalOWEa note that you sign to say that you owe someone some money

Examples from the Corpus

IOU• Essentially, a bond is an IOU.• Essentially, a bond is an IOU.• There is no reason why children could not implement their own economies, swappingtokens and IOUs.• As we will discuss later in more depth, bonds are IOUs that pay a specificrate of inter-est.• There was anger among farmers, who were being given IOUs instead of cash for their crops.• But the government could issue IOUs with zerocoupons to shareholders.• A banker's acceptance starts off as a bill of exchange, which is itself a form of IOU.• Federalworkers have been left with IOUs to fund their retirement years.From Longman Business DictionaryIOUIOU noun [countable] informalsomething, usually a note, that you give to someone to show that you owe them a particular sum of moneyCommercial paper is a kind of corporate IOU.